Fine
let me explain
Her {0} and {1} are called place holders
Which will be replaced with the value mention in that position along the String.Format method
Here along the syntax
String.Format(“{0} is {1}”, “John”, “Home”, “far away”)
So that 0 and 1 will be replaced with its corresponding values like John for 0 and Home for 1
As John mentioned as first and home mentioned as second
So the output will be like
John is Home
For more details on such an example with UiPath
Cheers @andreus91